/Engine/Source/Runtime/Landscape/Classes/LandscapeComponent.h
Gets the landscape paint layer weight value at the given position using LandscapeLayerInfo . Returns 0 in case it fails.
float EditorGetPaintLayerWeightAtLocation ( const FVector & InLocation, [ULandscapeLayerInfoObject](API\Runtime\Landscape\ULandscapeLayerInfoObject) * PaintLayer )